Great minds think alike! I also had this idea today while sitting in Algebra (where some of my greatest ideas come from...few of which have to do with math). Great idea!

I'll go to 1901 with the building of the fourth Dungeness Light in England. It stands today, as the "Old Lighthouse", while a newer one has taken over its duties.

http://www.dungenesslighthouse.btinternet.co.uk/page4.html